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_bitIndex = 8;
#ifdef OF_INFLATE64_STREAM_M
_slidingWindowMask = 0xFFFF;
#else
_slidingWindowMask = 0x7FFF;
#endif
_slidingWindow = of_alloc_zeroed(_slidingWindowMask + 1, 1);
_slidingWindow = OFAllocZeroedMemory(_slidingWindowMask + 1, 1);
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
if (_stream != nil)
[self close];
free(_slidingWindow);
OFFreeMemory(_slidingWindow);
if (_state == HUFFMAN_TREE) {
free(_context.huffmanTree.lengths);
OFFreeMemory(_context.huffmanTree.lengths);
if (_context.huffmanTree.codeLenTree != NULL)
of_huffman_tree_release(
_context.huffmanTree.codeLenTree);
}
if (_state == HUFFMAN_TREE || _state == HUFFMAN_BLOCK) {
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if OF_UNLIKELY (!tryReadBits(self, &bits, 4))
return bytesWritten;
CTX.codeLenCodesCount = bits;
}
if OF_LIKELY (CTX.lengths == NULL)
CTX.lengths = of_alloc_zeroed(19, 1);
CTX.lengths = OFAllocZeroedMemory(19, 1);
for (uint16_t i = CTX.receivedCount;
i < CTX.codeLenCodesCount + 4; i++) {
if OF_UNLIKELY (!tryReadBits(self, &bits, 3)) {
CTX.receivedCount = i;
return bytesWritten;
}
CTX.lengths[codeLengthsOrder[i]] = bits;
}
CTX.codeLenTree = of_huffman_tree_construct(
CTX.lengths, 19);
CTX.treeIter = CTX.codeLenTree;
free(CTX.lengths);
OFFreeMemory(CTX.lengths);
CTX.lengths = NULL;
CTX.receivedCount = 0;
CTX.value = 0xFF;
}
if OF_LIKELY (CTX.lengths == NULL)
CTX.lengths = of_alloc(
CTX.lengths = OFAllocMemory(
CTX.litLenCodesCount + CTX.distCodesCount + 258, 1);
for (uint16_t i = CTX.receivedCount;
i < CTX.litLenCodesCount + CTX.distCodesCount + 258;) {
uint8_t j, count;
if OF_LIKELY (CTX.value == 0xFF) {
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CTX.litLenTree = of_huffman_tree_construct(CTX.lengths,
CTX.litLenCodesCount + 257);
CTX.distTree = of_huffman_tree_construct(
CTX.lengths + CTX.litLenCodesCount + 257,
CTX.distCodesCount + 1);
free(CTX.lengths);
OFFreeMemory(CTX.lengths);
/*
* litLenTree and distTree are at the same location in
* _context.huffman and _context.huffmanTree, thus no need to
* set them.
*/
_state = HUFFMAN_BLOCK;
|